CDL Doubles and Triples Practice Test Results

Question 1
84% answer correctly
Driving a truck with double or triple trailers requires:
More skill than driving with a single trailer
More following distance than driving with a single trailer
More care when driving in bad weather and on grades
All of these are correct
Question 2
86% answer correctly
During your pre-trip inspection of your double rig you inspect the converter dolly. Its air tank drain valves should be __________ and the pintle hook should be __________.
Closed, free
Closed, latched
Open, free
Open, latched
Question 3
78% answer correctly
Suppose that you test the brakes on a trailer by opening the service line valve at the rear of the last trailer. Which of the following will happen?
You`ll see the emergency valve open and release air
You`ll see the brakes on the last trailer engage
Nothing
You`ll hear air escaping from the open valve